Chosen Solution
hi, i received an iPhone SE in these conditions:
I placed a new screen and battery and turned on the iPhone, the iPhone turned on and everything worked except for the front and rear cameras and the flash. I ordered the rear camera part and replaced it. Then i plugged the iPhone to the charger and tried to turn it on but it was completely dead. If i try to plug it to the computer iTunes doesn’t detect the iPhone. I tried to boot the iPhone plugged to the charger without battery and still doesn’t turn on
You need power (battery or external power supply) to turn on a iPhone Also you need a battery in the phone to be able to connect to itunes The rear cameras has the build in flash. Did you get a faulty battery ? from your photo it looks like this was the first time the battery was removed
There is some technical issue in your battery so go for the external power supply option. Or press the Volume up button followed by the Volume down button and then quickly press and hold the Side button until you see the Apple logo to force restart your iPhone SE